Can someone help out here? Im trying to figure out if there is a big difference between a 46lb thrust and a 56lb thrust omc. Right know I have a 67lb brute motorguide and its about to noisy and wore out and I have always like those omc's. If I went to a 46lb omc would it pull as good as my old motorguide 67lb? Its on a 20ft skeeter.